Numbers 4:13
They shall take away the ashes from the altar, and spread a purple cloth on it.
Exodus 27:1-8
"You shall make the altar of acacia wood, five cubits long, and five cubits broad; the altar shall be foursquare: and its height shall be three cubits.
Exodus 39:1
Of the blue, purple, and scarlet, they made finely worked garments, for ministering in the holy place, and made the holy garments for Aaron; as the LORD commanded Moses.
Exodus 39:41
the finely worked garments for ministering in the holy place, the holy garments for Aaron the priest, and the garments of his sons, to minister in the priest's office.
Leviticus 6:12-13
The fire on the altar shall be kept burning on it, it shall not go out; and the priest shall burn wood on it every morning: and he shall lay the burnt offering in order upon it, and shall burn on it the fat of the peace offerings.
Numbers 4:6-9
and shall put a covering of sealskin on it, and shall spread over it a cloth all of blue, and shall put in its poles.
Numbers 4:11-12
On the golden altar they shall spread a blue cloth, and cover it with a covering of sealskin, and shall put in its poles.